Reviewed: Audi A1 TFSI Sport

Sports performers come in all shapes and sizes but few are smaller than Audi's new A1 TFSI Sport.

The 3.95-metre-long hot hatch is the latest addition to Audi's three-door mini-car line-up. It is pitched as an obvious competitor to the Mini Cooper S and Citroen DS3, as well as one very clear in-house rival from parent company Volkswagen.

That car is the Volkswagen Polo GTI but the relationship it shares with the A1 is closer than merely that of a competitor.